Cosmology Forum

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Join in expert discussion on topics revolving around cosmology. Cosmology is the origin, evolution, structure and eventual fate of the universe.
Undergrad Role of Dark Matter in the Evolution of Large Scale Structure
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Undergrad Does the Cosmological Principle in any way underpin Big Bang Theory?
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Undergrad "Quasar clocks" and time running slower long ago
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Undergrad The theoretical basis for a hot Big Bang?
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Undergrad Seeking Visualization Tools for Hypothetical Black Hole Concept
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Undergrad Ancient galaxies: lack of mergers vs. subsequent spatial expansion
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Undergrad Cosmological red shift and cosmic time dilation
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Undergrad Entropy reversal in an infinite static universe?
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High School What does it mean to say the Universe is the same everywhere?
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Undergrad DeSitter cosmological horizon stability?
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Undergrad Could entropy be reversed eventually in the far future?
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High School How can a single Big Bang be true?
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Undergrad Einstein, Friedman and the cosmological constant
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Undergrad James Webb telescope calibration
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Graduate Largest Galaxy In An Infinite Universe
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Undergrad Is the expansion of the universe affecting time or just space?
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Graduate Has anyone read this new paper on extending the BGV?
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High School History of Cosmology: 1915-1929 | Einstein, Hubble & GR
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Graduate Evolution of radio sources mimics a non-expanding universe
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Undergrad New research puts age of the Universe at 26.7 billion years
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High School Age of Universe: Big Bang, Braneworlds & Perspective
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High School Cosmological time dilation of high-redshift quasars
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Graduate Help with IPTA Gravitational Waveforms Detected
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High School Expanding Universe -- What is it expanding into?
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Undergrad Could it be that the Big Bang had no cause?
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Undergrad Is there any way in the future to determine the Universe's size?
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Graduate Mass density of radiation in Friedmann equation?
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High School Is the Universe's age 13.7B years in a particular frame?
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Undergrad Developing Inflation Theory w/o Dark Energy: Alan Guth 1980
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Undergrad Is Penrose's Cyclic Cosmology Model Only Applicable on a Local Scale?
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High School How does gravity's warping of spacetime appear first among the forces?
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Undergrad The curvature and size of the Universe
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Graduate Updated Hubble constant from TRGB measurements
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Graduate Is M_{Pl} the Planck mass or the reduced Planck mass?
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Undergrad Topological phase transitions for the whole Universe...?
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High School Celestial objects in the very far future
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Undergrad CMBR Evidence for Non-Baryonic Dark Matter
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Undergrad Models where all symmetries would be approximate?
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High School Images with CMB used to Illuminate Dark Matter
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High School Which statement is more accurate? (Hubble's redshift vs. Hubble's law)
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Graduate Black hole mass coupled to expansion -- astrophysical source of dark energy?
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Graduate Scalar Field Dynamics in Inflation
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Graduate New paper claims there is evidence of suppression of structure growth
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Undergrad Research on conservation of spacetime curvature
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Undergrad Estimating Hot & Cold Spots in CMB Sky Maps
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Graduate Is there a way to convert distance modulus to get H(z) values
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Undergrad Non-homogeneous and anisotropic metric and laws of physics...?
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High School Subatomic particles and dark matter
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High School B-Modes in CMB Polarization - any change since BICEP2 in 2015?
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Undergrad How Does μ¨ Based Cosmology Impact Our Understanding of Galaxy Evolution?
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Graduate What does the TE CMB spectrum reveal?
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High School Where did the first universe come from?
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Undergrad How to Independently Determine the Proportion of Dark Energy Density?
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Undergrad Maximizing S/N in Angular Power Spectrum Signals
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Undergrad Are there non-smooth metrics for spacetime (without singularities)?
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High School Did Georges Lemaître Think the Universe Began from a Point?
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Undergrad Approximate local flatness = Approximate local symmetries?
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Undergrad Solutions that break the Lorentz invariance...?
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Undergrad When did the consensus on the maximum recession speed in cosmology change?
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Undergrad Can a scalar field model account for the cosmic redshift?
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Undergrad Inhomogeneities and topological defects in cosmology...
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Graduate Interpreting SDSS extragalactic data in the era of JWST
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High School Expansion of space affecting photon's energy
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Undergrad Density parameter and curvature index
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Undergrad What does it mean that symmetries do not hold globally?
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Undergrad Massive galaxies during the early Universe, new JWST data
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Graduate Data on galaxy rotation curves vs visible matter
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High School Mass of Space (B but approaching I)
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Undergrad Expansion of the Universe and the cosmological principle
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Undergrad Microwave background radiation - temperature at recombination
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Schwarzschild radius of the Universe
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High School Is There a Standard Definition for One Light Year Distance?
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Graduate Please help solve the equation in black hole f(R) theories
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Undergrad Question on the horizon problem
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High School Long String Theory: Unveiling the Universe's Secrets
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Undergrad Expansion-Collapse cycle in cosmological structures?
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Undergrad Local dark matter distribution
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Undergrad Successful predictions from anthropics? (History of science question)
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High School Does Roger Penrose's Big Bang cyclic-universe thing make sense?
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High School Is there any kind of anti-matter "problem"?
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High School Why so many want, or are not disturbed by, a "deterministic" universe?
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Undergrad Hubble flow kinetic energy into other types of energy?
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High School Is the Universe really infinite?
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Undergrad Can gravitational waves gain energy in an expanding FRW spacetime?
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High School How did the universe start and evolve into what it is today?
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High School Why the expansion after the "Big Bang" is showed in cylindrical form?
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High School Size of universe - rewinding big bang versus "flat" universe
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Undergrad What is Brian Austin Green talking about here?
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Graduate Does WHIM solve the dark matter problem?
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Undergrad Conservation of energy in quasar outflows?
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Undergrad Understanding the Zero Order Universe in Cosmology
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High School Dark Energy, Dark Matter and the Speed of Light
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Undergrad Hubble Parameter as function of time in universe models
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High School Does a contracting universe destroy its black holes?
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Undergrad Avoiding heat death in an accelerated expanding universe?
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Undergrad Internal energy of a comoving volume increasing as space expands?
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Undergrad Methods for energy harvesting in expanding universe?
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Undergrad Discover the Universe from Unique Vantage Points | Your Ultimate Guide
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Undergrad Is the Cosmological Constant Problem a Misunderstanding of Zero-Point Energy?
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Graduate Coefficient correlation between 2 cosmological probes
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